Hi all. I was wondering if someone could fill me in on why I can't receive responses from an application. Have been using TCPdump to watch the network communication between the client I'm writing and the server on the other end. I have no trouble sending data to it through the socket that I've created. When the server replies with a 6 byte '7e7e7e7e7e7e' reply i can't seem to read it from the DataInput stream. Here is the TCPDump of the packet I wish to read data from. I have included the IP and TCP headers in hex.
As can be seen from the offset value of 5 in the TCP header the 7e7e 7e7e 7e7e values should be considered data and I believe I should be able to read this out using the Input stream given by my socket. Only problem is when I go to read the input stream my program hangs (IE read never returns). I have tried using the readByte() method and it still hangs. Could anyone give me some feedback on what I'm doing wrong here? [This message has been edited by Chris Singer (edited December 05, 2001).]
Chris Singer
Greenhorn
Joined: Nov 27, 2001
Posts: 15
posted
0
Sorry folks, this isn't truly a valid question Java question as much as it is a networking question. The problem is TCP Dump was showing the 7e7e7e because its part of the ethernet packet. That is why I was unable to read it out of the data input stream. Cheers.
I agree. Here's the link: http://ej-technologies/jprofiler - if it wasn't for jprofiler, we would need to
run our stuff on 16 servers instead of 3.
subject: Could data be confused with the options field?
0
